Metal reinforcing and spacing bar.



A. E. LINDAU.

METAL n mrononm AND SPADING BAB.

.LPPLIUATIDH FILED JAN. 25., 1011.

Patented Jan. 16, 1912.

2 SHEETS-EHEBT l.

www N Zl//L'Zlzessesx A. E. LINDAU.

nml. BBINFGBGING AND SPAGING BAB.

. APPLIUATIOH FILED JAN. 25. 1911.v

Patented Jam 16, 1912.

2 SHEETS-SHEET 2.

UNITED VSTATES PATENT .OFFICE ALFRED E. LINDAU, F ST. LOUIS, MISSOURI, ASSIGNOB TO CORRUGATED BAR COM- PANY, OF ST. LOUIS, MISSOURI, A CORPORATION 0F MISSOURI.

METAL BEINFORCING AND SPACING BAB.

Specicatlon of Letters Patent.

l 'Patented Jan. 16,1912.

To 'whom it may concern:

Beit known that I, ALrREn E. LIKDAU, a citizen of the United States, and a resident .of the city of St. Louis and State of Missouri, have invented a new and useful lm- 1-provement in Metal Reinforcing and Spacing Bars, of which the following is a specificatlon. 'l My invention relates .to improvements in w 'reinforced concrete structures in which ten- 'jfeion bars arejused in s aced relation to eachv other, and consists in t 1e provision of a combined tension bar and spacing member, for positioning the principal tension .bars and at the same time taking any stresses transverse to the principal tension members. f

Inmany concrete structures, particularly ioorpanels, walls and arches, it 1s necessary sto make provision for taking care of tension stresses'- transverse to the direction of principal stress. It may he that the direction of theprincipal tension stress changes with a change in the distribution of the load, but inany case it is found that vtension mem- 15.,.bers running in more than one direction in "f substantially lthe same plane must be used to properly reinforce such structures' It is also of import-ance that the tension members be arranged in the structure in close prox- .so imity to the region of greatest tension stress, which is usually for the most part adjacent to a surface. Reinforcing bars cannot. be securely bonded in the concrete at the surface of the structure, and so are usually placed entirely within the structure and as near the surface, or region of greatest stress, as is practicable. In erecting reinforced concrete structures where the reinforcement is arranged adjacent to a surface it is neces- 40fsary to provide some means to space the reinforcement from the sides of the forms used, otherwise in iplacing and tamping the concrete there is".lability of some of the various members of the reinforcement being misplaced and perhaps forced against the sides of the forms, which is highly undesirable.

My invention accomplishes both of these objects, comprising, as it does, a combined tension bar and spacing device, and in addition'providesa simple means for mechanically securing together tension bars, s acing devicesand other elements of meta reinforc ment, either before or after placing in 56 the orma.

'tensionlbars us'ed therewith in Further objects of my invention appear in the accompanying drawings, forming a part of this specification, and will be more fully described in connection therewith, and particularly pointed out in the claims.

In the drawings, in which like numerals are used to designate like parts throughout the several views, Figure 1 is a partial plan view of my improved tension and spacing bar, showing parts of two tension bars in connection therewith; Fig. 2 is a partial side 'elevation of my improved bar, showing two section; Fig.

3 is a section on the line 3-3 in Fig. 1, looking in the direction of the arrows; and Fig.

4 is a partial view in perspective of a modilied form of tension and spacing bar` :showing @part of a tension bar in connection there 1th.

All of the reinforcing bars illustrated in the accompanying drawing comprise a body portion having longitudinalribs on diametvrically opposite sides thereof and transverse ribs extending across the surface of the reinforcing bars from one longitudinal rib to the other. Those of the reinforcing bars, which are intended to accomplish the function of framing togetherand ositioning the various members of the rein orcement relative to each other and to the forms or centering, such as the bar 11 of Figs. 1 and 2 and the' bar 21 of Fig. 4, have longitudinal flanges 13 and 23 on their longitudinal ribs. These anges are sheared to partially sever portions thereof, and these sheared portions are bent at right angles, so as to form spacing or positioning members or sup orts 14 and 24. The bar 11 is also provide with a longitudinal flange 12 approximately midway between said first mcntioned flanges, that is,` in a plane perpendicular to the plane of the lian es 13 and at the side opposite vthat towa which the spacing members 14 extend. The flange 12 is provided with spaced notches 18 adapted to receive transversely arranged tension bars 16. The notches 18 are of greater depth than the thickness of the bars 16, so the corners 15 of the flanges adjacent thereto project above the section of greatest width of the bar 16 when positioned therein. 'These corners may be mashed down or bent in by a blow from a ros hammer to embrace and securely fasten the ln the form of my device shown in Fig. l 4 the teneio bnr QLis provided with lateral [hinges 23 having depending spacing menihers 24, :ind :in lipstiinding longitudinal flange 22,-.-g|iiil:il lo the device shown in` Figs. 1 toi. Thellzrnge 22 is 'provided with notches 28 adapted to emln'zicl ti-.uisiciqcf tension liars 2.1111111 oneeornor of the (hinge :uljin'ent each noteh is provided with ii tongue' 2Q ivliioh-:nmy be lient :ici-oss the notch oveizllielmi` 2510 retiiin the latter lin position in .tlic notch. 'The hnrfs lt :ind 25 :ire shown lniving triinsveiieli' ori-:united raised ribs or ooingntions 19 Vfind 2, rcspeetively, ivhieh corriigiitions'4 nix-rmt :my lnnl gitndinul inovenieiihof the mrsY I6 anql 25 in g. the notrliesin which"they :ire Secured greater than the xlistimee between tivo corrng'iitioilis. :Ihiis lily fnrins'of sietiiriiip;` means ure 'egnliiu'ly iiduptutfr use with eorrngaited nits, tlmiicrh effective 'with plain hairs. It. is evident init tlieefm'ins of seenringr ineens niiiy he used to connect und A ein-e together various 4parts-of'iiietiihrein,- L, fori-ement', irrespective oftlie'lzlmipo'iijnd ize j of the parts iiinhpnrticnlair-plaine*oi":ii'i'iingcl 1. nient in the strinjtnre.

l do not wish, to lilniti'iny invention to the einhodiinenlsioiiii 'mid deserfilied-lieiein, lint what. l onsiilei" to=.hcf1iew 'iinl iioefiil sind of my invention :ind desire to slecni'c hy A Letters liileiit. ihiis follows. i 'I l. As ii nengiilf'iil of.nnlhnfiietni'e, ii hiir;l for i'einforeing eonifrete'eonniriing'it tliielr' body portion haring thinner. longifni'linzil ihinges un diii'iiieiiii-:illy it|ipo.s'iic sides sind 4 :i third longitintlenznl. hi'nge gnidnfarv between said Irst. ini-nljJiiyl` nungen.' Enid third u flange having bnr-seating notches in its edge, saiil first mentioned flanges being shenicd to form spain-in members which are bent outwardly in ii. direction opposite to that. of said third flange. i

L. As :i new :1i-ticle of manufacture, n. bar for reinforeing concrete comprising a body' portion having: longitudinal ribs on diameti'icnlly opposite sides :ind thinner longtud- .niil hinges on-'siiid rihs, lsaid flanges being [sheen-ed to form 4spacing member?, a thirdA Hangiextending longitudinally midway between siiid firstmentionedllangcs and luwinflr notehes in its edge constituting liar retaining seats.

3. In- :i -nietnl `reinforce. for concrete .sti-neutres. the eomhnmtion of a,- reinforcing hat comprising' ii lioily poi-tion having longitndmiii ribs on ilmmet'rically opposite godes und thinner flanges on said ribs, 'said thingeslwing Sh'eiiretl and the sheared por? lionshent ontwiiiidty to form spacing ineinhem and lni'ving' n third tongitiidiniil flange n iidiviiy between siiidtii'st mentioned flanges vand on theside opposite :nid lspacing ineinbersxnid having notches in itsedgc cons tituting lmr retaining seats, find-another rein- L .v 4

forcing.l bm' .provided with'longitudmal and transverse nhs; 'sliiid hist 'mentioned bar l eing. arranged-ine notlii'if said first. men tioiicd lmr, and iliecoriirs of sind notch be@ ing mashed Vdown to ovei'lal the longtiidi-4 nid ril` und thereby 'hold t Y ALFRED'E LINDAU. WyVilnesse-s:

At M. 'Hormnnnf' M. A, Sin-11mm."

` l'm elbar m place: 

